<template>
    <div>
        <el-breadcrumb separator="/">
          <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
          <el-breadcrumb-item>权限管理</el-breadcrumb-item>
          <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>

            <!-- 角色列表区域 -->
            <el-table :data="roleList" border stripe>
              <!-- 展开列 -->
              <el-table-column type="expand">
                <template slot-scope="scope">
                  <!-- 每个一级权限占一行 -->
                  <el-row class="bdtop" :class="{'bdbottom' :i1===scope.row.children.length-1}" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                    <el-col :span="5">
                      <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                      <i class=""></i>
                    </el-col>
                    <el-col :span="19">
                      <!-- 每个二级权限占一行 -->
                      <el-row class="vcenter " :class="{'bdtop':i2!==0}" v-for="(item2,i2) in item1.children" :key="item2.id">
                        <el-col :span="6">
                          <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">
                            {{item2.authName}}
                          </el-tag>
                        </el-col>
                        <el-col :span="18">
                          <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                        </el-col>
                      </el-row>
                    </el-col>
                  </el-row>
                </template>
              </el-table-column>
              <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                      <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                      <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                      <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>

        <!-- 分配权限的对话框 -->
        <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
          <!-- 树形控件 -->
          <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
          <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allotRights">确 定</el-button>
          </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
  data () {
    return {
      // 所有角色列表数据
      roleList: [],
      // 控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的id值数组
      defKeys: [],
      // 当前即将分配权限的id
      roleId: ''
    }
  },
  created () {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList () {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      this.roleList = res.data
      console.log(this.rolelist)
    },
    // 根据id删除对应的权限
    async removeRightById (role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '是否删除',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除')
      }
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      role.children = res.data
    },
    // 展示分配权限的对话框
    async showSetRightDialog (role) {
      this.roleId = role.id
      // 获取所有权限数据
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限列表失败')
      }
      // 把获取到的权限数据保存到data中
      this.rightslist = res.data
      console.log(this.rightslist)

      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },
    // 通过递归的形式,获取角色下所有三级权限的id,并保存到defKays数组中
    getLeafKeys (node, arr) {
      if (!node.children) {
        // 如果当前node节点不包含children属性,则是三级节点
        return arr.push(node.id)
      }
      node.children.forEach(item =>
        this.getLeafKeys(item, arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights () {
      const keys = [
        ...this.$refs.treeRef
          .getCheckedKeys(),
        ...this.$refs.treeRef
          .getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/
      rights`, { rids: idStr })

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
html,body,#app {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  min-width: 1366px;
}
</style>
